Driving device



' 5, 1937. p, VANDENPUT I 2,094,730

DRIVING DEVICE Filed Nov. 28, 1956 2 Sheets-Shem! 1 Q [mic/Wan.-

T hm; Mame/war A TTORNEY Oct. 5, 1937. P. VANDENPUT 2,094,730

DRIVING DEVICE Filed Nov. 28, 1936 x I 2 Sheets-Sheet 2 Inn-"rm.- Pzam: Mme/IP07 fen-f W Arronuer UNITED STATES PATENT OFFIQE DRIVING DEVICE:

Pierre Vandenput, La Hulpe, Belgium Application November 28, 1936, Serial No. 113,240 In Belgium November 30, 1935 1 Claim. (Cl. 74288) The present invention is an improved driving through the tubular members 23-23' and are device for web winding rollers, such as are used provided at their ends with cap-shaped enlargefor winding paper, cardboard, fabric, rubber, ments or heads 24, which are rigidly connected sheet metal, etc, in long lengths. by means of bolts to the gear wheel I6 and the The object of the invention is to provide an brake pulley I9 respectively. improved driving device in which the tension of The gear wheel I6 meshes with a pinion H the web is held constant during the winding feathe'redupon the shaft of the winding roller I8. process. Upon the rim of the brake pulley acts a brake For this purpose, it has been proposed to inband, which may be made of metal, leather, fab- 10 clude in such driving means a differential gear ric or any other convenient material, with inter- 10 and a brake mechanism operating on the casing position of an appropriate friction surface. The thereof to vary the speed of the driven member action of this brake is adjustable by a screw 20 of the gear and correspondingly vary the speed and return springs 20'.

of the winding roller. When no cause disturbs the angular speed of The invention will be described with reference the roller I8, the transmission elements, as well 5 to the accompanying drawings. as the planet pinions and the driving wheels im- Fig. 1 is a longitudinal section of the differenpart to the roller a circumferential speed slightly tial transmission device. greater than that of the sheet-like material to be Fig. 2 is a section on line 11-11 of Fig. I. wound upon the roller, so that said material will Fig. 3 is a side view according to the arrow F. be put under an initial tension, which, moreover, 2O

According to the invention, the differential will remain constant during the formation of the transmission device comprises a shaft l, to which roll of material, owing to the adjustable slipping a uniform angular speed is imparted by pulley, action of the brake I9-2ll. gear or motor I. This shaft rotates in ball I claim:

bearings 2 and is provided with a fixed pinion 3 In a driving device for a web winding roller 25 meshing with a crown wheel 4 driving the differcomprising a driving shaft, gear wheels, a difential casing 5. ferential gear intermediate the driving shaft and In the form illustrated, this casing 5 is prothe roller and an adjustable brake element adaptvided with four bushes, in which is mounted a ed to control the speed transmitted to the windspider 6, in the central portion of the device. ing roller, the arrangement of a differential cas- 30 The four shaft ends of this spider are each proing, which is directly driven by the driving shaft vided with a bevel pinion I, freely rotating thereand gear wheels, a housing fixed intermediate on, said pinions being the planet wheels of the two fixed tubular members in alinement with differential. These bevel pinions I mesh with each other and parallel to the driving shaft, the the sun wheels 8 and 9 feathered at the ends of differential casing being rotatably mounted in 35 independent auxiliary shafts II], II. The diflersaid housing, one of said tubular members roential casing 5 is rotatably mounted in ball beartatably supporting a brake pulley surrounded by ings I l-I5 within a housing 2I fixed to the maan adjustable brake band and the other tubular chine frame by means of lugs 22 and intermedimember rotatably supporting a gear wheel mesh- 40 ate two fixed tubular members 23, 23', in alineing with aspur-wheel on the winding roller shaft, 40 ment with each other and parallel to the drivthe shafts of the differential sun wheels passing ing shaft I. Upon the tubular member 23 is through said tubular members and having at mounted a gear wheel I6 with interposition of a their ends enlarged heads rigidly connected to ball bearing I2. Upon the tubular member 23 is the brake pulley and the gear wheel respectively mounted a brake pulley I9 with interposition of for the purpose set forth.

a ball bearing I3. The shafts I0 and II pass P. VANDENPUT. 

